In the Christian literature about spirit one of the decisive questions that influences the interpretation of spirit at many points is whether all spirit is conceived to be divine or whether there are basically two kinds of spirit, human and divine. In Buber's understanding the spirit of love exists in the sphere ‘between’ and is participated in by humans rather than being produced by human will alone. Buber would thus come into the class of persons advocating that there is basically One Spirit.1 Human spirit is seen to be in some way a response to or a sharing in the reality of the One Spirit. Paul Tillich, one of the greatest Christian students of Spirit, is somewhat unclear as to whether there are basically one or two kinds of spirit. On the one hand, he consistently uses two terms, ‘human spirit’ and ‘Spiritual Presence’, by which he means divine Spirit.2 The use of these two terms would seem to indicate two kinds of spirit. Tillich describes at length these two kinds of spirit and speaks of their relationship as that of ‘mutual immanence’.3 On the other hand, in his view of reality in the broadest perspective all spirit is an ontological reality that has its source in the trinitarian life of God.4 This suggests that there is only one Spirit after all.